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Finding the Fourth Proportional to 676.66, 933.69 and 396.79

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Solution

The fourth proportional to 676.66, 933.69 and 396.79 is: 547.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.66 : 933.69 = 396.79 : x
  2. Step 2: Convert to fraction form
    676.66/933.69 = 396.79/x
  3. Step 3: Cross multiply
    676.66x = 933.69 × 396.79
  4. Step 4: Simplify right side
    676.66x = 370,474.03
  5. Step 5: Solve for x
    x = 370,474.03/676.66
  6. Step 6: Final answer
    x = 547.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.